A label widget displays a text string or a bitmap. Options for frames are also valid options for labels, additional options determine what the label displays. The reference documentation for labels is label.

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proc push_button {}
 {
    .ent insert 0 "Hello "
}
label .lab -text "Enter name:"
entry .ent
button .but -text "Push Me" -command "push_button"
pack .lab
pack .ent
pack .but

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